Fixed indentation (#1689)
Fixed indentation (#1689)

Refer to : https://github.com/mozilla/thimble.mozilla.org/pull/1663#issuecomment-276567176
humphd/thimble.mozilla.org,mozilla/thimble.mozilla.org,mozilla/thimble.mozilla.org,humphd/thimble.mozilla.org,mozilla/thimble.mozilla.org,humphd/thimble.mozilla.org,humphd/thimble.mozilla.org,mozilla/thimble.mozilla.org